Does anyone have experience using the Schneider Apo-Symmar L 5,6/120mm lens on 4x5? Schneider's literature indicates that this lens has a 62 degree angle of view and 148mm image circle diameter at full aperture. The specifications change to a 75 degree angle of view and 189mm image circle diameter at f-stop 22.

So, at a recommended working aperture the coverage should be sufficient for 4x5, but I am wondering if the coverage at full aperture makes viewing or focusing difficult. Are the corners of the image in the ground glass dark or unviewable with the lens at full aperture? I guess particularly if using a rise or fall adjustment when examining the ground glass at full aperture, it might be dark in the corners. What is your experience using this lens? How usable is it on 4x5? Is it easy enough to work around the small coverage at full aperture?